Lockdown is used when there is an immediate threat to the people in a building. In the event of a lockdown, you should secure yourself in the room your are in. Do not leave until the surrounding area has been cleared by law enforcement officers.
Procedure-
Stay in your room or office and barricade the door.
Remain quiet.
Do not attempt to leave the building or room.
Wait until emergency personnel give you an “all clear!”
This allows emergency responders to secure the students and staff in place, address the immediate threat and remove any innocent bystanders from immediate danger to an area of safety.